二に本ほん建だて

expression

dual system; double standard

Refers to a system or arrangement where two different standards, rules, or structures coexist, often with a critical nuance of inconsistency or unfairness.

• その会かい社しゃは社しゃ員いんと契けい約やく社しゃ員いんで二に本ほん建だての給きゅう与よ体たい系けいを取とっている。

  That company has a dual salary system for regular employees and contract workers.

• 彼かれの言げん動どうには二に本ほん建だての基き準じゅんがあるように思おもえる。

  His words and actions seem to have a double standard.